外源ALA对盐胁迫下豌豆幼苗生理特性的影响

Effect of Exogenous ALA on Physiological Characteristics of Pea Seedlings under Salt Stress

在温室条件下研究外源ALA对盐胁迫下豌豆幼苗生理特性的影响.在100mmol/L NaCl盐胁迫下,研究0.001～1mmol/L ALA对豌豆幼苗生理特性的影响.100mmol/L NaCl盐胁迫导致豌豆幼苗氧化损伤,SOD等保护酶活性升高;0.1 mmol/L ALA处理对盐胁迫下的豌豆幼苗有显著的保护作用,使叶片MDA含量降低25.87%,SOD,POD和CAT活性分别提高28.74%,20.68%和36.83%,幼苗株高、鲜物质量分别提高0.975,0.15倍,从而增强幼苗的抗盐性.0.1mmol/L ALA能缓解盐胁迫下豌豆幼苗的氧化损伤,显著提高SOD等保护酶活性.

The objective of this study is to investigate the effects of exogenous ALA on stress-resistance physiological characteristics in pea seedlings under salt stress.We have used 100 mmol/L NaCl to produce the salt stress,under which the effects of exogenous ALA have been measured on MDA content and activities of SOD,POD and CAT in leaves of pea seedlings.The results show that pea seedlings are destroyed by oxidation under salt stress of 100 mmol/L NaCl,the activities of SOD increase.After pea seedlings under salt stress are treated with 0.1 mmol/L ALA,the content of malonaldehyde(MDA) in leaves reduces 25.80% significantly,while the activities of SOD,POD and CAT in leaves increase 28.70%,13.60% and 36.80%,plant height and fresh weight increase by 0.975-fold and 0.15-fold,respectively.So the stress-resistance ability of pea seedlings and the activity of SOD treated with 0.1 mmol/L ALA can be increased under salt stress.